What is the vital capacity of our lungs?

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Question

(B) The correct answer is $B$. Vital capacity $(VC)$ is the maximum volume of air a person can breathe in after a forced expiration. It is the sum of

Vedclass · Accepted Answer

Total lung capacity minus residual volume

Vedclass · Answer

(B) The correct answer is $B$. Vital capacity $(VC)$ is the maximum volume of air a person can breathe in after a forced expiration. It is the sum of tidal volume $(TV)$,inspiratory reserve volume $(IRV)$,and expiratory reserve volume $(ERV)$. Total lung capacity $(TLC)$ is the total volume of air accommodated in the lungs at the end of a forced inspiration,which includes $VC$ and residual volume $(RV)$. Therefore,$TLC = VC + RV$,which implies $VC = TLC - RV$.

List-$I$ (Respiratory Volume)	List-$II$ (Capacity in mL)
$A$. $ERV$ (Expiratory Reserve Volume)	$I$. $2500-3000 \text{ mL}$
$B$. $RV$ (Residual Volume)	$II$. $500 \text{ mL}$
$C$. $IRV$ (Inspiratory Reserve Volume)	$III$. $1000-1100 \text{ mL}$
$D$. $TV$ (Tidal Volume)	$IV$. $1100-1200 \text{ mL}$

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